BIOS 1500 Lecture Notes - Lecture 4: Karl Pearson, Exponential Distribution, Iqvia

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29 Apr 2017
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A primary concept in statistics is that of the distribution of the values for a variable. The relative frequency is the proportion of times a given value occurs. Recall the frequentist idea of the proportion estimating the probability of a value occurring. The distribution" is the frequency or relative frequency with which each value occurs. The distribution can be viewed as a graph where the x" axis lists the possible values of the variable, and the y" axis gives the frequency or relative frequency with which each value occurs. One of the first things to consider is the type of variable: continuous variable or discrete variable. These two categories impact the graphical depiction of the distribution. If we have a variable which is discrete then the distribution for that variable will be discrete: with gaps between the values. A continuous variable will have a continuous distribution of values: no gaps (at least theoretically).